/Engine/Source/Runtime/GeometryCore/Public/MeshQueries.h
Because Hausdorff distance is not symmetric, we compute the maximum of the distances between two surfaces.
template<typename MeshSpatialType> static double TwoSidedHausdorffDistance ( const TriangleMeshType & MeshA, const MeshSpatialType & SpatialA, const TriangleMeshType & MeshB, const MeshSpatialType & SpatialB )